You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I have planned and reserved my ticket fro AUS to DEN, for the convocation but my convocation got postponed.So please cancel my recent reservation?

ASSISTANT: May I know your dates of journey?

USER: I have reserved my ticket on the dates of 02/12 and 02/14.

ASSISTANT: Ok, may I know your name please?

USER: My ticket is reserved in the name of Emily Rodriguez.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found basing on your details.

USER: Ok, fine thank you for your information.

ASSISTANT: Thank you for contacting us.