You are a flight assistant. 
 USER: Hello. I am Donna Nelson.

ASSISTANT: Hello, how may I serve you?

USER: I am planning to go for a private moon walk with my partner in BOS. Can you book me a ticket from HOU?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My departure will be on Mar 21st and arrival will be on Mar 23rd.

ASSISTANT: Noted. Do you have any preferences?

USER: Yes, I would like to depart in the afternoon.

ASSISTANT: Sorry, there is no flight available on your journey dates.

USER: That's alright, thanks for your assistance.

ASSISTANT: You are welcome, have a nice day.