You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ashley Baker.

ASSISTANT: How may I help you?

USER: I am planning to meet my colleague in Oakland, so please book a flight ticket from Philadelphia.

ASSISTANT: Can I know your airport codes?

USER: My source and destination airport codes are PHL and OAK.

ASSISTANT: Let me know your travelling dates?

USER: I want to fly on Mar 05, return on Mar 07.

ASSISTANT: Connecting flight can be booked with airline Southwest for price 100. Shall I book a ticket?

USER: You can reserve it.

ASSISTANT: Your ticket is booked having flight number 1013.

USER: Thank you.

ASSISTANT: Thanks.