You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I help you?

USER: I am Margaret Roberts, I want to travel to CA - OAK from TX - DFW. Can you help me in booking my flight ticket with fare of 500?

ASSISTANT: Sure, I am here to help you, may I know your travelling dates?

USER: I will depart on 04/05 and return on 04/07.

ASSISTANT: Please mention your price limit.

USER: I already mentioned above.

ASSISTANT: There is a Frontier 1018 with fare of 100 which matches your travelling dates. Shall I proceed with booking?

USER: Ok, proceed.

ASSISTANT: Your booking has been confirmed on name of Margaret Roberts.

USER: Thanks for assisting me.

ASSISTANT: Thank you for approaching us.