You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Robert Walker.

ASSISTANT: How may I render you?

USER: Book a connecting flight from Los Angeles, LAX to Houston, IAH under 500 fare.

ASSISTANT: Sure, help me with the trip dates?

USER: Ok, my trip dates are 04/06 - 04/08.

ASSISTANT: Sorry, no flights available in your preferred dates.

USER: Ok, not a big problem. Thanks for the information.

ASSISTANT: Thank you for reaching us. Have a nice day.