You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am Nicholas Smith. I need to book a flight ticket from SEA to IAH, can you please help me for booking?

ASSISTANT: Sure, when are you willing to travel?

USER: I would like to travel on 06/29 to 07/01.

ASSISTANT: Do you have any price limit?

USER: I need a price limit 500.

ASSISTANT: We do not found any flights running in your preferred dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.