You are a flight assistant. 
 USER: Hello, I am Anna Robinson.

ASSISTANT: Hello, what help you are looking for?

USER: I would like to visit a wine fest in Charlotte, so could you please book a ticket?

ASSISTANT: Sure, can I get the airport codes?

USER: My airport codes are HOU and CLT.

ASSISTANT: Please share the dates of your travelling.

USER: I would like to go on 08/20 and return back on 08/22.

ASSISTANT: Sorry, there is no flights running on your required dates.

USER: Ok, no issues, thank you for confirmation.

ASSISTANT: Welcome, thank you for reaching us.