You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am planning a vacation at Houston underground tunnel tour, can you help me to book a flight with one connection?

ASSISTANT: Sure, Please let me know your travel dates.

USER: My planned dates are 09/01 and return on 09/03.

ASSISTANT: How much is your fare limit for this journey?

USER: The price limit should be 5000.

ASSISTANT: Kindly provide me your airport codes.

USER: My airport codes are SFO and HOU.

ASSISTANT: Sorry for the inconvenience, there are no flights found on your requested dates.

USER: Ok, no issues.

ASSISTANT: Please can I have your name?

USER: Sure, I am Steven Phillips.

ASSISTANT: Have a nice day.

USER: Thanks for your help and support.