You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I support you?

USER: I'm Robert Hill. Please book a ticket from San Francisco, CA-SFO to New York, NY-LGA.

ASSISTANT: Ok, please share your travelling dates?

USER: Departure date is 05/18 and 05/20 is return date.

ASSISTANT: Do you have any other specifications?

USER: Ticket price limit is 1000. Flight connections limit is 1.

ASSISTANT: We found a connecting flight with fare of 300 in Frontier airline. Shall I proceed for booking?

USER: Please book a ticket.

ASSISTANT: Your ticket has been booked.

USER: Please let me know flight number?

ASSISTANT: 1017 is flight number.

USER: Thanks.

ASSISTANT: Thanks for opting us.