You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to visit Houston HOU from Charlotte CLT. Can you find a flight ticket for me?

ASSISTANT: Sure. Tell me your travel dates please?

USER: Ok, my itinerary dates are on July 04 and return on July 06.

ASSISTANT: May I know your name please?

USER: Ok, I am Alexander Nelson.

ASSISTANT: Are you looking for a stopover in your journey?

USER: I need a direct flight to travel.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: Ok, not an issue.

ASSISTANT: Thank you.

USER: Thank you for your information.