You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephen King.

ASSISTANT: How can I help you Stephen King?

USER: I would like to travel from and to IAH on a round trip. Can you help me in booking a ticket?

ASSISTANT: Sure, can you please provide your journey to check for the flights availability?

USER: I am planning my journey on dates 08/26 and 08/28.

ASSISTANT: Give me a moment, I will find the best service available for you.

USER: Sure. Make sure that the price is below 200.

ASSISTANT: I have searched with your request of price below 200, but I couldn't find any flights.

USER: That's fine, I will find other way out. Thank you for your information.

ASSISTANT: Thank you for contacting us.