You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Can you please book a flight ticket from IAD to LGA?

ASSISTANT: Sure, may I know your travel dates?

USER: I have planned to travel on dates 03/11 and 03/13.

ASSISTANT: Do you prefer economy or business class?

USER:  I am comfortable with any class.

ASSISTANT: On which name do you like to reserve?

USER: My name is Amanda Allen.

ASSISTANT: Do you have any other preferences?

USER: I want to return at afternoon.

ASSISTANT: Sorry, there is no flight on your on your route.

USER:      That's ok, thank you for the response.

ASSISTANT: Thank you.