You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Dorothy Hall.

ASSISTANT: How may I help you?

USER: Can you help me in booking from PHL to PHX, as there is a business meeting to attend at Phoenix?

ASSISTANT: Sure, tell me your travel dates please?

USER: My trip dates are 04/27 to 04/29.

ASSISTANT: Thanks for waiting patiently. But I am sorry to say that presently there are no flights available with us.

USER: No issue, thank you.

ASSISTANT: Ok. Thanks for contacting us.