You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: Matthew Harris here and I would like to attend a business meeting in Seattle, can you please reserve a flight ticket from HOU to SEA?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: Thank you, my departure is on Jan 05 and please book my return ticket also on Jan 07.

ASSISTANT: Do you have any timings to travel?

USER: Please book my departure flight at evening time and return flight at afternoon time.

ASSISTANT: Sorry Matthew Harris, no flight is available to you on your dates in your required timings.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Welcome.