You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Nicholas Lee.

ASSISTANT: How may I help you today? Hope you are doing well.

USER: I work in Jacobs engineering company in Dallas, which provides building and infrastructure services. Please book a ticket from ATL - DFW.

ASSISTANT: Sure.

USER: Depart date on 10/01 and arrive on 10/03.

ASSISTANT: Thank you for your your information. Please give me a minute to check.

USER: Ok.

ASSISTANT: Thank you for waiting. There is no flight is available on these dates.

USER: Ok, not an issue.

ASSISTANT: Do you have any other dates?

USER: No I do not have other dates. Thanks for your information.

ASSISTANT: Ok. Welcome.