You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Can you please help me in booking a flight ticket from IAD to LAX, as I have to attend a meeting at Los Angeles?

ASSISTANT: Sure, can you please mention with your dates of journey?

USER: Sure, my travel dates are from Sept 15 to Sept 17.

ASSISTANT: May I know your good name please?

USER: Myself Christine Clark.

ASSISTANT: Are you looking for any other help from my side please?

USER: I would prefer connecting flight for my trip.

ASSISTANT: Ok, wait for a moment please.

USER: Sure.

ASSISTANT: Sorry Clark, there is no flight found as per your travelling details.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: You are welcome.