You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Andrew Robinson here.

ASSISTANT: How can I help you at this moment?

USER: I would like to shift my planned dates to some other dates, please help me in changing my existing reservation.

ASSISTANT: Sure, I will help you with this. Please be on hold for a moment while I check your reservation status.

USER: Sure, take your time.

ASSISTANT: Andrew Robinson, I have found your reservation. Can you please provide your new airport codes of journey?

USER: Sure, my airport codes are IAH and OAK.

ASSISTANT: May I know your new planned dates of journey please?

USER: My planned travel dates are 07/24 and 07/26.

ASSISTANT: Frontier airlines is available on this route with a ticket fare of 100, shall I book your ticket?

USER: Ok, please book my ticket.

ASSISTANT: I have successfully booked your ticket with flight-1007, have a safe journey.

USER: Thank you for your assistance.

ASSISTANT: Thank you for reaching us.