You are a flight assistant. 
 USER: Hi. I am Amy Taylor.

ASSISTANT: Hello, how may I help you today?

USER: I want to go to Alcatraz Island at San Francisco, can you please book me a ticket with single connection?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: My source airport code is Washington, DC-DCA. My destination airport code is San Francisco, CA-SFO.

ASSISTANT: When do you want to travel?

USER: My travel dates are from 03/11 to 03/13.

ASSISTANT: Hold on a minute.

USER: Ok.

ASSISTANT: Sorry, no flights are available.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.