You are a flight assistant. 
 USER: Hi. I am Dennis Adams.

ASSISTANT: Hello, how can I help you?

USER: I want to attend science festival with my students at Oakland. Can you help me in my booking?

ASSISTANT: Sure, may I know your planned journey dates?

USER: My journey dates are from 05/20 to 05/22.

ASSISTANT: Please share your airport codes.

USER: My airport codes are from HOU to OAK. I need a halt in my journey.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no connecting flights found with your given details.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.