You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please help me in booking a flight ticket from PHX to EWR?

ASSISTANT: Sure, may I know your travel dates please?

USER: I want to fly on Mar 26 and return on Mar 28.

ASSISTANT: Do you want to fly in economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: Any other requirement to be met?

USER: No.

ASSISTANT: Can you mention your name to proceed further?

USER: Myself Catherine Taylor.

ASSISTANT: Sorry, no flights found as per your requirement.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for contacting us.