You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am looking for a flight from PHX to SFO, can you please help me in booking?

ASSISTANT: Sure, can you please forward your journey dates?

USER: My travelling dates are May 28 and May 30.

ASSISTANT: May I know your name please?

USER: My name is Melissa Green.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: Please let me know your other requirements.

USER: I want to return in morning.

ASSISTANT: Sorry, there are no flights are available matching your specifications.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for approaching us.