You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Susan Smith here.

ASSISTANT: How may I assist you?

USER: I would like to book a ticket from DCA to LGA, can you please help me with that?

ASSISTANT: Sure, can you please share your journey dates?

USER: The travel dates are from 09/09 to 09/11.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Susan, no flights has been found on your journey dates.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for approaching us.