You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jessica Allen.

ASSISTANT: How may I help you today?

USER: I am planning to travel from Phoenix to Charlotte to attend my friend's birthday party, can you help me in booking?

ASSISTANT: Sure, I am here to help you with that. Can I know your travelling dates?

USER: My journey dates are 05/18 to 05/20.

ASSISTANT: Ok, may I know your airport codes?

USER: My source is PHX and destination is CLT.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: No issue, thank you for checking.

ASSISTANT: Thank you for approaching us.