You are a flight assistant. 
 USER: Hello, I am Carol Hall.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to visit a Alcatraz Island at San Francisco, so could you please book a flight ticket with a connecting flight?

ASSISTANT: Sure, I can book a ticket to San Francisco. May I know, your travelling dates?

USER: I would like to fly out on 10/19 and intend to return on 10/21.

ASSISTANT: Ok. Please let me know where are your departing from?

USER: I am departing from Phoenix, AZ-PHX.

ASSISTANT: Mention your destination also, please.

USER: My destination airport code is CA-SFO.

ASSISTANT: Ok. Thanks for sharing, but no flights are available on respective dates of travel.

USER: No problem, I will try with another airline.

ASSISTANT: Ok, Thanks for reaching us, Have a nice day.

USER: Thank you.