You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to travel from LGA to SEA as a business trip, can you do the reservation?

ASSISTANT: Sure, we are glad to help you. Can you please let me know your travelling dates?

USER: My trip dates are 06/21 and 06/23.

ASSISTANT: Do you have any other specifications?

USER: I am comfortable with any flights.

ASSISTANT: May I know your good name?

USER: Alexander Martin here.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: No issue, thanks for the information.

ASSISTANT: Thank you for choosing us.