You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you?

USER: I am Christine Smith from Denver. I have to go to Houston next week for my film shooting purpose. Can you please book a flight ticket for me?

ASSISTANT: Sure, can you share your journey dates?

USER: Thank you for your positive response, I want to take off on 08/14 and please book my return ticket also on 08/16.

ASSISTANT: May I know your airport codes for booking?

USER: I want to fly from DEN and destination airport is HOU.

ASSISTANT: Do you have any specifications?

USER: I want a window seat. Can you help me with that?

ASSISTANT: There is a connecting flight with number 1011 in airline AA, the fare is 100. Can I book it?

USER: Is it window seat or not?

ASSISTANT: You can select near the boarding point.

USER: No, I am busy at that time. Can you please confirm now?

ASSISTANT: Sorry, we don't have an option.

USER: Oh! So sad. It's ok please book this flight ticket.

ASSISTANT: Your ticket is reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.