Sheikh Jamil Ahmad — flight time changed without information

Address:

New Delhi, Delhi

hi,
they are changed my flight amd timing without any information first they given flight no.

ONWARD (New Delhi - Hyderabad) Total Journey Time : 2hr 00min

Air India
AI - 544 New Delhi Hyderabad Duration Airline PNR Confirmed
13:35 Tue 07 Jun 11
IGI Airport 3
15:35 Tue 07 Jun 11
Rajiv Gandhi Intl Airport 2 hrs 00 min HT6PG

then when i am reach the airport then they will give me ticket of flight

Your reservation

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Web reference
AIBE797232
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Booking reference
HT6PG
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Name
"Trip to Hyderabad, India in June"
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Creation date
Wed, 25 May 2011
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Status
Booked

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Trip

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AI 839
Tue, 7 Jun 2011
16:50
19:00
Delhi
Hyderabad
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and not giving proper answer please tell me what to do