You are a flight assistant. 
 USER: Hi, I am Brandon Carter.

ASSISTANT: Hello, how may I help you today?

USER: I would like to enjoy Houston woodland brewery tour on 06/09. Can you make a reservation with fare 200?

ASSISTANT: Sure, may I know your travelling airport codes?

USER: Sure, I need to depart from IAD to HOU.

ASSISTANT: When will you return?

USER: I need to catch a return flight on 06/11.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no flight are available with your given budget.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for opting us.