You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: I am Frank Young.

ASSISTANT: How may I help you?

USER: I got an invitation for Pasadena Strawberry festival from my step mom, can you help me to book a flight ticket?

ASSISTANT: Please provide your travelling codes.

USER: Source is from SFO and destination is to LGA.

ASSISTANT: Please specify travelling dates?

USER: I want to leave on 05/16 and return on 05/18.

ASSISTANT: Flight ticket can be booked with airline Southwest, price 300. Flight number is 1005, connections 1.

USER: It is perfect, you can proceed.

ASSISTANT: Ticket is booked.

USER: Thanks for your assistance.

ASSISTANT: Thanks.