You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jennifer Edwards.

ASSISTANT: How can I help you?

USER: I have to change my travel dates in my previous reservation as my planned trip got postponed. So please help me with that.

ASSISTANT: Please wait a moment.

USER: Thank you. I will wait for your response.

ASSISTANT: Sorry, no reservation found by your name.

USER: No, I know the month in which my reservation has done. So once again check for that.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: No reservation found by your name.

USER: Oh! May be I did not checked my mail properly about confirmation of reservation. Anyway, thank you for your time.

ASSISTANT: Thanks.