You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Benjamin Walker here. I want to book a flight ticket from PHX to BOS. Can you help me in that?

ASSISTANT: Sure, kindly share your travel dates.

USER: My trip dates are July 26 to July 28.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there is any other specifications?

USER: My depart time should be in the evening.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: Ok, no problem.

ASSISTANT: Thanks for reaching us.

USER: Thank you.