You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: On 12/20 my daughter birthday so, I am planning to surprise her with my presence. Can you aid me in booking my flight ticket to Houston, HOU.

ASSISTANT: Sure, can you please share your boarding point?

USER: Ok, Charlotte, NC - CLT is my boarding point.

ASSISTANT: When do you want to return from HOU?

USER: On 12/22, I want to return.

ASSISTANT: May I know your good name?

USER: Jack Mitchell is my name.

ASSISTANT: Please wait for a moment.

USER: OK.

ASSISTANT: Thanks for your patience.

USER: OK.

ASSISTANT: Sorry to inform you that there are no flights found with your requirements.

USER: Ok, no problem.

ASSISTANT: Thank you for consulting us.

USER: Thank you for the information.

ASSISTANT: Have a nice day.