You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you help me to change my reservation to next week?

ASSISTANT: Sure, can you give me your name?

USER: Sure, my name is William Smith.

ASSISTANT: We found a reservation under your name. Can you share your changed trip details?

USER: Sure, my new airport codes are HOU and DTW.

ASSISTANT: What are your travel dates?

USER: My travelling dates are July 01 and 03.

ASSISTANT: Do you need any connections?

USER: I prefer connecting flight.

ASSISTANT: Are there any other preferences?

USER: No.

ASSISTANT: Sorry, there is no flight found with your details.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for reaching us.