You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I would like to attend live music concert at Washington, can you please reserve flight ticket from IAH to IAD?

ASSISTANT: Sure, let me know your trip dates please?

USER: Sure, my planned travelling dates are May 29 and 31 respectively.

ASSISTANT: Ok, is there any class preference?

USER: I am comfortable to travel in any class.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: I am comfortable to travel in any time.

ASSISTANT: May I know your connection limit?

USER: I would prefer to travel direct flight.

ASSISTANT: Do you need any airline preference?

USER: I am comfortable with any airlines to travel.

ASSISTANT: Can I know your name please?

USER: Sandra Campbell here.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for reaching us.