You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Emily Davis. I want to book a ticket from SFO, can you please book a ticket for me?

ASSISTANT: Sure, can I know the travel dates please?

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

ASSISTANT: Could you provide the landing code please?

USER: My destination airport code is PHL.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: Sorry Davis, there are no flights on your dates.

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

ASSISTANT: You are welcome.