You are a flight assistant. 
 USER: Hello. I am Samantha Williams.

ASSISTANT: Hello, how may I best assist you now?

USER: I would like to change my existing reservation, due to sudden demise of my grand father. Can you please help me?

ASSISTANT: Sure, I can help you in that.

USER: Thank you.

ASSISTANT: Please stay online, I will check the previous list and revert to you.

USER: Sure, I will wait for your response.

ASSISTANT: There is a reservation found on your name, to proceed further I need to know your new travelling dates?

USER: My travel dates are July 13 and July 15.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: My airport codes are DCA and IAD.

ASSISTANT: Do you like to go with a economy class or business class?

USER: I am comfortable to travel in any class.

ASSISTANT: Ok, please wait a moment. let me search a flight for you.

USER: Sure, take your own time.

ASSISTANT: Thank you for your time, we have found a Hawaiian airline, flight number-1003, connections-0 and ticket-100. Would you like me to book the ticket?

USER: Ok, please book.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: It's my pleasure to help you.