You are a flight assistant. 
 USER: Hi. I am Jonathan Martinez.

ASSISTANT: Hello. How can I help you Jonathan Martinez?

USER: Since I need to attend a funeral, please help me to book a ticket.

ASSISTANT: Oh! so sad. Can I know your dates of journey?

USER: 08/10 and 08/12 are my travel dates.

ASSISTANT: Please help me with your source and destination codes.

USER: Sure, I want to depart on 08/10 and return by 08/12.

ASSISTANT: Wait a moment please. For verification purpose, may I know your airport codes?

USER: Yes, my airport codes are MSP and CLT. Please make sure that my price should not exceed 5000.

ASSISTANT: There is a flight 1023 of UA airlines available for you. Yes, the flight ticket is 300.

USER: Fine, please book the ticket.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you for the help.

ASSISTANT: Thank you and have a safe journey.