You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carol Miller.

ASSISTANT: How can I help you now?

USER: I want to change my travel dates in my previous reservation so can you please help me with that?

ASSISTANT: Sure, I will help you. Please, wait a minute.

USER: Ok, thank you for your response.

ASSISTANT: Thank you for waiting, we found a reservation on your name.

USER: Thank you.

ASSISTANT: Can you please please share the dates that you  would like to change?

USER: I want to take off on Oct 15 and book my return ticket also on Oct 17.

ASSISTANT: Let me know your airport codes.

USER: I want to fly from IAH and destination airport is IAD.

ASSISTANT: Please, standby.

USER: I want to depart in afternoon time so please check with this.

ASSISTANT: Thank you for your time, we found a direct flight of Frontier airline that depart in the afternoon time. Shall I confirm it in business class?

USER: Please book this flight ticket for me.

ASSISTANT: Your ticket has been reserved with flight number 1019.

USER: Thank you.

ASSISTANT: Thank you for choosing us.