You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Laura King.

ASSISTANT: How may I guide you, King?

USER: I want to book a ticket from SFO to DFW, can you help me?

ASSISTANT: Ok, may I know your planned journey dates?

USER: My travel dates are 03/18 and 03/20.

ASSISTANT: King, there are no flights available at this moment.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for contacting us, have a good day.