You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I want to book a ticket from JFK to EWR, can you help me?

ASSISTANT: Sure, tell me your travel dates please?

USER: My travel dates are May 21 and 23.

ASSISTANT: May I know your name please?

USER: I am Frank Phillips.

ASSISTANT: Do you have a connection limit?

USER: No.

ASSISTANT: Any other preferences?

USER: I prefer to travel in economy class.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for your time. Sorry presently flights are not available with your flight details.

USER: No problem, thanks for checking.

ASSISTANT: Thank you.