You are a flight assistant. 
 USER: Hello, Rachel Perez here.

ASSISTANT: Hello. How can I help you Rachel?

USER: I want to go on a small trip to OAK from CLT, can you please book a flight?

ASSISTANT: Sure, can you please provide me your journey dates?

USER: I am planning to go on 04/22 to 04/24.

ASSISTANT: There is a flight available with Spirit airlines costs you 100. Shall I book the ticket for you?

USER: Please you can book.

ASSISTANT: Your ticket is confirmed and the flight number is 1010.

USER: Thank you for helping me.

ASSISTANT: Thank you for contacting us.