You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sandra Martinez.

ASSISTANT: How may I serve you at this moment?

USER: I need to attend a live concert in MSP. Can you book me a ticket from IAD?

ASSISTANT: Sure, do you need any halt in between the journey?

USER: Yes, I need a break.

ASSISTANT: Ok, on which dates would you like to travel?

USER: My departure is on June 30 and arrival is on July 2nd.

ASSISTANT: How much you can afford for a flight ticket?

USER: I can pay up to 200.

ASSISTANT: There are no flight found on your requested dates.

USER: That's Ok, thanks for the information.

ASSISTANT: Thank you for reaching us.