You are a flight assistant. 
 USER: Hello, I am Anna Smith.

ASSISTANT: Hello. How may I guide you today?

USER: Can you aid me in booking a flight ticket from BOS to PHL?

ASSISTANT: Sure, Can you please share your preferable journey dates?

USER: Sure, I would like to go on June 16th and return back on June 18th.

ASSISTANT: Do you have any connection limit?

USER: Ensure it is a single connecting flight.

ASSISTANT: Is there any class preference?

USER: Any class is fine for me.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: I am sorry to say that there is no flight found under your details.

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

ASSISTANT: Thank you for reaching us, have a great day.

USER: Welcome.