You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am looking to change the trip dates in  the past ticket because the examination is postponed. Can you please help me to do that?

ASSISTANT: Sure, we are here to help you. May I know your name?

USER: Thank you for considering my request. My name is Jacob Parker.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: It's ok, not a problem with that. Anyways thank you for your time.

ASSISTANT: Thanks for approaching us.