You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Paul Taylor here. Do you have any flight from BOS to LAX?

ASSISTANT: Ok, let me know your dates of travel.

USER: I would like to travel on 01/24 and 01/26.

ASSISTANT: Sorry, there is no flight with your preferences.

USER: It's ok, thanks for your information.

ASSISTANT: Thanks choosing us.