You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jessica Miller here.

ASSISTANT: How can I assist you?

USER: I want to reserve my ticket from HOU to AUS to visit Austin, can you please help me out?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: Sure, my planned dates of journey are from Dec, 10 to Dec, 12.

ASSISTANT: May I know your class preference please?

USER: No.

ASSISTANT: May I know which airlines do you prefer to travel?

USER: No, I need a depart time which is at morning.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates with your given details.

USER: Ok, that's fine.

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

USER: Anyways, thank you for your service.