You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Rachel Mitchell. I would like to book a ticket from IAD to OAK, can you help me?

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

USER: My travel dates are 06/24 and 06/26.

ASSISTANT: Please wait for a moment to check for the availability.

USER: Sure.

ASSISTANT: There is a flight with the connecting flight of fare 400 and the airline is Southwest, are you ok with this?

USER: My price limit is 200.

ASSISTANT: Sorry, there is no flight found.

USER: No problem, thanks for checking.

ASSISTANT: You are welcome always.