You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be a help for you?

USER: I am Catherine Thomas, please look for a flight from SFO to PHL.

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

USER: Sure, my planned dates are from 02/15 and 02/17.

ASSISTANT: There is a flight available on your requested dates from UA airlines with a fare of 100.

USER: Ok, please book it for me.

ASSISTANT: Your ticket is booked with flight 1001.

USER: Thanks for your help.

ASSISTANT: Thank you for flying with our service.