You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Lisa Lopez. Can you please book a flight ticket from BOS to MSP?

ASSISTANT: Sure, I will help you out. May I know your travelling dates please?

USER: Sure, I need to travel on dates of 02/09 and 02/11.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

ASSISTANT: There is a flight with price 400 and connection 1, can I proceed?

USER: No, my budget is 200 so please recheck with that.

ASSISTANT: Sorry, there are no flights with your required price.

USER: Oh! It is sad to hear.

ASSISTANT: Thank you for reaching us.

USER: Anyway, thank you for your time.