You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Christopher Perez here, I want to reserve my ticket from LAS to LAX, can you please help me?

ASSISTANT: Please provide me the travel dates?

USER: Sure, my planned dates of journey are from Apr, 09 to Apr, 11.

ASSISTANT: Is there any connection limit?

USER: Yes, I need a direct flight.

ASSISTANT: May I know the class preference?

USER: Yes, I need a economy class.

ASSISTANT: Are there any more preferences?

USER: No.

ASSISTANT: Christopher Perez, I regret to inform that there are no flights on your route with the given dates.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us.