You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to book a ticket from ORD to ATL, can you help me?

ASSISTANT: May I know your travelling dates?

USER: My trip dates are 10/14 and 10/16. I want to book a ticket in the name of Ryan Carter.

ASSISTANT: Sorry, there is no flight available at your request.

USER: No problem, I will go in train.

ASSISTANT: Thank you for reaching us.

USER: Thank you for checking.

ASSISTANT: You are welcome.