You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Cynthia Rodriguez.

ASSISTANT: How can I provide service to you?

USER: I want to book a  flight ticket from NV-LAS to TX-IAH. Can you help me?

ASSISTANT: Sure, help me with your starting date of journey?

USER:  I would like to start on 10/14 .

ASSISTANT: Do you have any preferences?

USER: I need a flight ticket within 200.

ASSISTANT: On what date you are willing to return?

USER: 10/16 will be my return.

ASSISTANT: Thanks for sharing your details with patience. Please hold on, I will get back to you with the flight details.

USER: Ok.

ASSISTANT: Thanks for being on hold, I found a connecting flight from an UA airline of fare 100 and flight number 1019. Shall I proceed to book?

USER: You can reserve  it.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your help.