You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you now?

USER: I am Frank Gonzalez want to visit San Francisco, can you book a ticket from PHL to SFO?

ASSISTANT: Sure, can you please mention the travelling dates of your journey?

USER: Sure, my travelling dates will be 04/19 and 04/21.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, there is a flight 1013 in Hawaiian airline has the price 100. Can I proceed with this booking?

USER: Ok, proceed. Thank you.

ASSISTANT: Your booking is done, have a safe journey. Thank you.