You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gary Johnson.

ASSISTANT: How may I serve you?

USER: I need to meet my friend on 07/10 because me and my friends planned to have a  night out in Houston.

ASSISTANT: Ok.

USER: Could you please help me in booking a ticket with fare of 5000?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know, from where you are planning to take off?

USER: I planned to move  from Las Vegas NV-LAS.

ASSISTANT: Let me know your return date.

USER: I would like to return on 07/11.

ASSISTANT: Kindly, mention your landing airport code.

USER: My landing point is Houston TX-IAH.

ASSISTANT: Please, provide your depart date.

USER: I would like to start on 07/09.

ASSISTANT: Please, wait a while.

USER: Sure.

ASSISTANT: Thank you for waiting. Unfortunately, there are no flights available that matches your requirements.

USER: No problem, thank you for your valuable information.

ASSISTANT: Thank you for reaching us.