You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you help me to change my reservation?

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

USER: I am Jerry Rodriguez.

ASSISTANT: Ok, wait for some time I will check the reservations on your name and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting we found reservation on your name, can you share me your travelling dates?

USER: My travel dates are Mar 03 and Mar 05.

ASSISTANT: May I know your source point and destination point?

USER: My airport codes are PHL and SFO.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for approaching us.