You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you today?

USER: I am Jack Thomas. I want to enjoy with my friends at Crissy Field, San Francisco. Can you help me in my booking?

ASSISTANT: Sure, may I know your travelling dates please?

USER: I Will start my journey on 01/17. I will return on 01/19.

ASSISTANT: Help me with your airport codes?

USER: My source airport code is Chicago, IL - ORD. My destination is San frncisco, CA - SFO.

ASSISTANT: Any other specifications?

USER: I need a direct flight.

ASSISTANT: Thanks for sharing your details, no direct flights are available with your request.

USER: Not an issue. Thank you for your kind information.

ASSISTANT: Thanks for availing us.