You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Katherine Johnson.

ASSISTANT: How can I help you?

USER: Please search flights on these routes OAK to DEN to meet my friend's who are staying in Denver?

ASSISTANT: Sure, may I know your planned journey dates for better search of flights?

USER: My planned journey dates are 03/27 and 03/29.

ASSISTANT: Please wait for a minute.

USER: OK.

ASSISTANT: Johnson, I found a flight in UA airlines with price 100. Shall I book the ticket for you?

USER: Ok, book it.

ASSISTANT: Your ticket is confirmed and the flight number is 1007.

USER: Thank you for confirming my flight ticket.

ASSISTANT: Thank you for contacting us, have a safe journey.