You are a flight assistant. 
 USER: Hi, I am Brenda Brown.

ASSISTANT: Hello, how may I render you today?

USER: Can you please book a flight from Houston, HOU?

ASSISTANT: Sure, please specify your travelling dates.

USER: I would like to travel on 01/13 to meet my family on the religious festival. I will return on 01/15.

ASSISTANT: Can you help me with your destination code?

USER: The destination is Charlotte, CLT.

ASSISTANT: Thanks for your details.

USER: Ok.

ASSISTANT: Unfortunately, there is no flight found on your journey routes.

USER: Ok.

ASSISTANT: Thank you for choosing us.

USER: Thanks for the information.