You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Ruth Roberts here. I want to give a demo dance class on my college , so please book my ticket from LAS to DFW.

ASSISTANT: Sure, I am happy to help you with the ticket booking. Can you please provide me your planned travel dates?

USER: My travelling dates are 05/31 and 06/02.

ASSISTANT: Ok, please tell me your airlines preference.

USER: I am comfortable with any airline.

ASSISTANT: Ok, please be on hold for a minute.

USER: Ok, take your own time.

ASSISTANT: Sorry to inform you that, there is no flight found with your details.

USER: No problem, thank you for your reply.

ASSISTANT: You are welcome. Thank you for reaching us.