You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I provide service to you?

USER: I want to book a direct flight to attend for an interview.

ASSISTANT: Ok.

USER: Can you please book a ticket on 09/08?

ASSISTANT: Sure, can you please forward your airport codes?

USER: Sure, my source is Los Angeles, CA - LAX. My destination is Houston, TX - IAH.

ASSISTANT: Do you have any specifications?

USER: My price limit is 500.

ASSISTANT: When are you willing to return from IAH?

USER: I intend to return on 09/10.

ASSISTANT: Thanks for providing your information. Unfortunately there are no flights found with your budget.

USER: Ok, no worries. Thank you for your help.

ASSISTANT: May I know your good name for documentation purpose?

USER: Sure, I am Dorothy Garcia.

ASSISTANT: Thank you for selecting our service.